instance method validate_transformation

# File activestorage/lib/active_storage/transformers/image_magick.rb, line 11
        def validate_transformation(name, argument)
          method_name = name.to_s.tr("-", "_")

          unless ActiveStorage.supported_image_processing_methods.include?(method_name)
            raise UnsupportedImageProcessingMethod, <<~ERROR.squish
              The provided transformation method is not supported: #{method_name}.
            ERROR
          end

          if argument.present?
            if argument.is_a?(String) || argument.is_a?(Symbol)
              validate_arg_string(argument)
            elsif argument.is_a?(Array)
              validate_arg_array(argument)
            elsif argument.is_a?(Hash)
              validate_arg_hash(argument)
            end
          end

          super
        end